Google Art Project is a site that lets users takes virtual tours of museums and art galleries, similar to Google Street View.

Google Transliterate is a service that helps users type in a different language.

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An anonymous Quora user explains transliterate:

Say you speak another language (which does not use the standard Roman alphabet), but you can't write it very well. Or you have a recording of another language and want to translate that.

In comes transliterate - you just type in the phonetic sounds of the language, and it converts it into the desired language. They've really done a good job to hide the link recently, but I managed to dig it up Google Input Tools

Build with Chrome is a partnership between Google Australia and Lego. The project is a way to show how Google's Chrome web browser can display 3D images. Users can build their own 3D Lego structures too.

Google Think is a site for advertisers and similar professions to get marketing insights and inspiration straight from Google.

Power Searching with Google is a feature that sharpens users search skills. Google's search experts offer tips and tricks to better navigate the search engine and help you find exactly what you're looking for.